五.广告流水灯实验

int Led1 = 1;
int Led2 = 2;
int Led3 = 3;
int Led4 = 4;
int Led5 = 5;
int Led6 = 6;
 
void style_1(void)//从低到高亮
{
  unsigned char j;
  for(j=1;j<=6;j++)
  {
    digitalWrite(j,HIGH);
    delay(200);
  }
  for(j=6;j>=1;j--)//从高到低亮
  {
    digitalWrite(j,LOW);
    delay(200);
  } 
}
 
void flash(void)//先从低到高点亮，再从低到高熄灭。
{   
  unsigned char j,k;
  for(k=0;k<=1;k++)
  {
    for(j=1;j<=6;j++)
      digitalWrite(j,HIGH);
    delay(200);
    for(j=1;j<=6;j++)
      digitalWrite(j,LOW);
    delay(200);
  }
}
 
void style_2(void)//灯从内往外点亮，在从外向内熄灭。
{
  unsigned char j,k;
  k=1;
  for(j=3;j>=1;j--)
  {   
    digitalWrite(j,HIGH);
    digitalWrite(j+k,HIGH);
    delay(400);
    k +=2;
  }
  k=5;
  for(j=1;j<=3;j++)
  {
    digitalWrite(j,LOW);
    digitalWrite(j+k,LOW);
    delay(400);
    k -=2;
  }
}
 
void style_3(void)//先从外向内点亮，再从内到外熄灭
{
  unsigned char j,k;
  k=5;
  for(j=1;j<=3;j++)
  {
    digitalWrite(j,HIGH);
    digitalWrite(j+k,HIGH);
    delay(400);
    digitalWrite(j,LOW);
    digitalWrite(j+k,LOW);
    k -=2;
  }
  k=3;
  for(j=2;j>=1;j--)
  {   
    digitalWrite(j,HIGH);
    digitalWrite(j+k,HIGH);
    delay(400);
    digitalWrite(j,LOW);
    digitalWrite(j+k,LOW);
    k +=2;
  } 
}
void setup()//定义输入输出接口
{ 
  unsigned char i;
  for(i=1;i<=6;i++)
    pinMode(i,OUTPUT);
}
void loop()//主函数
{   
  style_1();
  flash();
  style_2();
  flash();
  style_3();
  flash();
}